Forced-lubrication apparatus provided with pumps



K. G. F. HELLSING.

FORCED LUBRICATION APPARATUS PROVIDED WITH PUMPS.

APPLICATION FILED OCT- 4. I920.

Patented July 4, 1922.

4 /7 venior UNETEE STAT KARL GUSTAF FRIDOLF HELLSING, oE'sTooKHo M, SWEDEN, A SIGNOR T0 J. a c. G. BOLINDERS MEKANISKA VERKSTADS AKTIEBOLAG, OF STOCKHOLM, SWEDEN, A MANUFACTURING COMPANY REGISTERED UNDER, THE LAWS OF SWEDEN.

FORCED- LUBRICATION APPARATUS PROVIDED WITH PUMPS.

Application filed October 4, 1920.

To all whom it may concern.

Be it known that I, KARL GUSTAE FRIDoLF HELLSING, a subject of the King of Sweden, residing at Stockholm, in the Kingdom of Sweden, have invented a new and useful Improvement in Forced-Lubrication Apparatus Provided with Pumps, of which the following is a specification.

The present invention relates to an improvement in forced lubrication apparatus of the type which are provided with pumps for supplying lubricant to the various places .to be lubricated, and in which the pump pistons are driven by eccentric disks or similar driving means mounted on a driving shaft. In lubricating apparatus of this type it has already been proposed to connect the pump pistons with their driving means in such manner that the pistons may be disconnected from said means when required. In this manner the advantage is attained that it is possible by manual operation of one or more pumps, rapidly to supply an increased quantity of lubricant to one or more places, when required for any reason, while the remaining pumps of the apparatus have their normal function. The said detachable connection between the pump pistons and their driving means has been effected by means of loose pressure links placed between said pistons and said driving means, said links actuating the pump pistons to move in one direction during the operation of the apparatus, and the movement of the pistons in the opposite direction being effected by springs which maybe compressed so that the said pressure links may be reinovad and the pump pistons'beactuated by The present invention relates to an improvement on the apparatus above referred to whereby the pump pistons become quite positively driven so that their movement becomes independent of spring actuation. The invention is principally characterized by this that the pump pistons are connected with their respective driving means through clutch devices resembling bayonet joints, in such manner that when said clutch devices are thrown in, the pump pistons are positively driven in both directions by the eccentric disks, or the driving means otherwise used. In this manner a perfectly reliable function of the lubricating pumps is at- Specification of Letters Patent.

Patented July 1, 1922.

Serial No. 414,600.

tained under all conditions, and it will also be easier with the present device than with the connection through loose pressure links above referred to, by means of a single manipulation to disconnect the pumps from the driving means during the operation of the engine, when it is necessary to supply an increased quantity of lubricant to a certain place.

An embodiment of the invention is illustrated by way of example in the accompanying drawing. Fig. 1 shows a vertical section of a forced lubrication apparatus according to the invention. Fig. 2 shows a side view of the bayonet joint clutch device, and Figs. 3 and 4 Show details of two modifications.

Referring to the drawing, 1 denotes the oil receptacle to one side of which several oil pumps 2 are attached, only one of said pumps being shown in the drawing. Each lubrication pump communicates with the oil receptacle 1 through a passage 3, and is pro vided with a pump piston 4 and with a spring actuated pressure valve 5, from which a tube 6 leads to the place to be lubricated. Each pump piston is driven by an eccentric disk 7 on a driving shaft 8 common to all pumps, said shaft being journalled. to one side of the receptacle 1 and being driven in any well known manner, for instance by means of a ratchet feed mechanism, from a member of the engine to be lubricated.

According to the present invention eachv pump piston 4 is connected with its eccentric disk 7 on the driving shaft by means of a bayonet joint clutch device comprising a member 9 surrounding the eccentric disk, and a stem 10 which is movable longitudinally as well as rotatable in the member 9. The member 9 is provided with a slot 11 extending in the longitudinal direction of the stem 10, and also with a short notch 12 extending at right angles from said slot, and the stem 10 is provided with a stud 13 which may be moved in said slot and said notch by longi tudinal movement and by turning of said stem 10 in similar manner as in a bayonet joint. For this purpose the stem is provided with a head 14. A coil spring 15 is inserted between said head and the member 9 which springtends to turn said stem and serves to maintain the stud 13 normally into engagement with the transverse notch 12, as

shownin Fig. 1, so that the member 9 and the stem are thus held connected to one another; 'As shown in Fig. 1, a sleeve 16is rotatably mounted on the lower end of the stem 10, but is not. movable longitudinally on the same, said sleeve 16 being provided with exterior screw threads, according to this embodiment. An arm 17'providedwith cor responding screw threads. .is screwed onto said sleeve, and the outer end of said arm is pivotally connected with the upper end. of

the pumppiston 4.

.Ii forany'reason, such as accidental heat;- ing. orrunning hot. or the like, it isnecessary to, supply at one time; an. increased. quantity. of: lubricant: to; a. certain place, it' is only necessar-yto: turn the stem. 10 connected with the corresponding pump, in such manner that the stud 13 on said stem is moved. out

into the longitudinal slot. 11. The stein-may then. befreely moved up and down in the member; 9., so. that the desired. quantity of lubricant may be pumped by. hand to the placein question, while the. other pumps continue: their. normal operation. After.- wards the spindle-10 is: turned: in such man.- ner that the stud 13 again comes into engagement with. the transverse notch 12- in which it. will. be retained by the spring 15',

and the pump. is thus againset for normal operation. During said operationth'e pump pistoriA; is IDOVBdf positively in both directions by. theeccentric disk. 7 ,so that it is always .forcedto-penform its complete stroke.-

By rotating the sleeve lfitliepump piston azmayberaised or lowered relatively to the steim'an'd the operative-strokeof the pump piston may thusbeTegulated, said operative stroke being-the distance from the point at which, during. its downward movement, the

piston: cutszofl" the communication between the passageB and:the pumpcylinder chamber below the piston, andthe lowermosti po-. sition of the piston. It: being possible to regulate said lastrmentioned positionby. ro-

tating the sleeve 16, it will be" understood that in thisma'nner it. is possibleto' increase or decrease the quantity of oil forced out into-the tube 6 at each stroke of the'pump.

It will bGIlIIClGI'StOOClEtl'IZLt the sleeve 16 by means of whichw said regulation 1s effected,

- may be constructed? in different. ways, proin Fig. 1. Again, Fig. 4: shows a sleeve 36 'which is provided with screw threads only on its inner side and is screwed onto the lowerscrew-threaded portion of the stem 10, the arm 3'? connecting the sleeve with the pump piston being rotatable on the sleeve but not movable. axially on the same.

The member 9 and the stem lO'may also be soconstructed that the slot 11 and notch 12 are provided in the stem, the stud 13 being attached to; the member. 9.

The member 9 may also receive its motion. from some other driving meansthan an eccentric disk, for instance fromacrank pin or; from aicam. groove device of one kind or another...

I claim;

1. In a forced lubrication. apparatus, the combination of a. receptacle for lubricant, pumps connected with said receptacle and adapted.- to pump the lubricant from the same, pistons in said pumps, driving means for said pistons, and a bayonet joint clutch device connecting each pump piston with its driving means. in such manner that when saidclutch device isthrown in the pump pis ton is positively driven in both directions by its driving'means.

2. In a forced: lubricationapparatus, the combination of a receptacle for lubricant, pumps connected with said: receptacle and adapted to pump the lubricant from the same, pistonsin said pumps, driving meansfor said pistons,. a bayonet joint clutch device connecting'each pump piston with its driving. means-in such manner that when said: clutch deviceiis thrown in the pump piston is positively. driVenin-both directions :by its driving means, and a spring tending to maintain the clutch device. in thrown-in position;

3.v In. aforced lubrication apparatus, the combination. of areceptacle for. lubricant, pumps connected with said receptacle and adapted. to piunp the lubricant from the same-pistons in said pumps, a driving means for each of said pumppistons, av stem con nectedwitheach pump piston, a stud on said stem, a member connected with each driving means and having an aperture inwhich said stem is rotatable and movable longitudinally, and'having-a slot in the longitudinal direction of said aperture and-a'notch transverse to' said slot in which slot and notch said stud is movable.

4a. In. a: forced lubrication apparatus, the combination of a receptacle for lubricant, pumps connected' with said receptacle and adapted to: pump the lubricant from the same, pistons insaid pumps, adrivingmeans for each of said pump pistons, a stem connected with each pump piston, a memberconnected withleach driving means and having an aperture in. which said stem is rotatable and movable longitudinally, and

means whereby said member and said stem are locked together in one position of rotation of said stem in said member and are disconnected so as to allow longitudinal movement of said stem relatively to said member in another position of rotation of said stem.

5. In a forced lubrication apparatus, the combination of a receptacle for lubricant, pumps connected with said receptacle and adapted to pump the lubricant from the same, pistons in said pumps, a driving means for each of said pump pistons, a stem connected with each pump. piston, a stud on said stem, a member connected with each driving means and having an aperture in which said stem is rotatable and movable longitudinally, and having a slot in the longitudinal direction of said aperture and a notch transverse to said slot in which slot and notch said stud is movable, and a coil spring inserted between said stem and said member and serving to maintain said stud on said stem normally in engagement with said notch in said member.

6. In a forced lubrication apparatus, the combination of a receptacle for lubricant, pumps connected with said receptacle and adapted to pump the lubricant from the same, pistons in said pumps, a driving means for each of said pump pistons, a stem for each pump, adjustable means connecting said stem with the pump piston, a stud on said stem, a member connected with each driving means and having an aperture in which said stem is rotatable and movable longitudinally, and having a slot in the longitudinal direction of said aperture and a notch transverse to said slot in which slot and notch said stud is movable.

KARL GUSTAF FRIDOLF HELLSING. 

